代码如下： <script language=JavaScript1.2> <!-- var bName=navigator.appName; var bVer=parseInt(navigator.appVersion); var NS4=(bName=="Netscape" && bVer >= 4); var IE4=(bName=="Microsoft Internet Explorer" && bVer >= 4); var fstr_r; var fstr_g; var fstr_b; var sItem="S"; function display(id, str){ if(NS4 || IE4){ if(NS4){ with (document[id].document){ open(); write(str); close(); } }else document.all[id].innerHTML=str; }else{ document.fsample2.startcolor.value=document.GradForm.start.value; document.fsample2.endcolor.value=document.GradForm.end.value; } } function makeArray(){ for(i = 0; i<makeArray.arguments.length; i++) this[i] = makeArray.arguments[i]; } var convert = new makeArray('0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'); function returnBase(number,base) { eval("var output=parseInt(number)"); if(isNum(number,base)){ if(number < base) output = convert[output]; else{ var MSD = '' + Math.floor(number / base); var LSD = number - MSD*base; if(MSD > base) output = returnBase(MSD,base) + convert[LSD]; else output = convert[MSD] + convert[LSD]; } }else{ output=0; } return output; } function isNum(no, base){ var cmp="0123456789"; var chkStr=no; var chkChar; var rc=true; var nLen; if(base == 16){ cmp+="ABCDEFabcdef"; }else if(base == 10){ eval("chkStr=''+parseInt(chkStr)"); } nLen=chkStr.length; for(var i=0; i<nLen; i++){ chkChar=chkStr.substring(i,i+1) if(i==0 && chkChar == "#" && base == 16){ }else if(cmp.indexOf(chkChar)<0){ rc=false; } if(rc == false) i=nLen; } return rc; } function chkNum(obj,base){ var form=document.GradForm; var rc=true; if(base==10){ eval("rc=form."+obj+".value <= 255"); } if(rc){ eval("rc=isNum(form."+obj+".value,"+base+")"); if(!rc){ alert("输入的数值不正确！"); eval("form."+obj+".focus()"); } }else{ alert("输入的数值大于255！"); eval("form."+obj+".focus()"); } return rc; } function twobyte(no){ var str=no; if(isNum(no,16)){ str="0"+str; str=str.substring((str.length-3)+1); }else{ str="00"; } return str; } function CstrLen(cStr){ var sLen=cStr.length; var j=0; for(var i=0;i<sLen;i++){ str=cStr.charAt(i); if(NS4 && str.charCodeAt(0)<1){ i++; } j++; } return j; } function GradientText(form, color1, color2, color3, gStr, gType){ var redStep, greenStep, BlueStep; var str_r, str_g, str_b, str; var gStep=CstrLen(gStr); var b1 = color1 % 0x100; if(isNaN(b1)) b1=0; var g1 = parseInt(color1 / 0x100) % 0x100; if(isNaN(g1)) g1=0; var r1 = parseInt(color1 / 0x10000) % 0x100; if(isNaN(r1)) r1=0; var b2 = color2 % 0x100; if(isNaN(b2)) b2=0; var g2 = parseInt(color2 / 0x100) % 0x100; if(isNaN(g2)) g2=0; var r2 = parseInt(color2 / 0x10000) % 0x100; if(isNaN(r2)) r2=0; var cStepAdd = parseInt(256 / gStep); if(g1 > g2){ greenStep = 0; }else if(g2 > g1){ greenStep = 1; }else{ greenStep = 2; } if(r1 > r2){ redStep = 0; }else if(r2 > r1){ redStep = 1; }else{ redStep = 2; } if(b1 > b2){ BlueStep = 0; }else if(b2 > b1){ BlueStep = 1; }else{ BlueStep = 2; } var GradStr=""; if(gType == 'S'){ GradStr+='<TABLE WIDTH="100%" BORDER=0 CELLSPACING=0 CELLPADDING=0><TR><TD ALIGN=CENTER BGCOLOR="'+color3+'"><br>'; } for(var i=0; i<gStr.length; i++){ str_r=twobyte(returnBase(r1,16)); str_g=twobyte(returnBase(g1,16)); str_b=twobyte(returnBase(b1,16)); str=gStr.charAt(i); if(NS4 && str.charCodeAt(0)<1){ str=str+gStr.charAt(i+1); i++; } GradStr+='<font color="#'+str_r+str_g+str_b+'">'+str+'</font>'; if(redStep==1){ r1 = r1 + cStepAdd; if(r1 > r2) r1 = r2; }else if(redStep==0){ r1 = r1 - cStepAdd; if(r1 < r2) r1 = r2; } if(greenStep==1){ g1 = g1 + cStepAdd; if(g1 > g2) g1 = g2; }else if(greenStep==0){ g1 = g1 - cStepAdd; if(g1 < g2) g1 = g2; } if(BlueStep==1){ b1 = b1 + cStepAdd; if(b1 > b2) b1 = b2; }else if(BlueStep==0){ b1 = b1 - cStepAdd; if(b1 < b2) b1 = b2; } } if(gType == 'S'){ GradStr+='<br> </TD></TR></TABLE>'; } return GradStr; } function GenTag(form){ var ss,ee,bb; if(!isNum(form.start.value,16)){ alert("请检查起始颜色数值"); }else if(!isNum(form.end.value,16)){ alert("请检查结束颜色数值"); }else if(!isNum(form.bg.value,16)){ alert("请检查背景颜色数值"); }else{ eval("ss=0x"+form.start.value.substring(1)+";"); eval("ee=0x"+form.end.value.substring(1)+";"); eval("bb=form.bg.value"); form.code.value=GradientText(form,ss,ee,bb,form.showstr.value,"C"); } } function newRGB(type, field2){ var form=document.GradForm; var chkOK=true; var vNo; if(field2==""){ if(sItem=="S"){ chkOK=chkNum('start',16); }else if(sItem=="E"){ chkOK=chkNum('end',16); }else if(sItem=="B"){ chkOK=chkNum('bg',16); } } if(chkOK){ if(type==0){ if(field2 != "") eval("chkOK=isNum(form.rgb_"+field2+".value,10)"); if(chkOK){ if(field2 != "") eval("chkOK=chkNum('rgb_"+field2+"',10)"); if(chkOK){ fstr_r=twobyte(returnBase(form.rgb_r.value,16)); fstr_g=twobyte(returnBase(form.rgb_g.value,16)); fstr_b=twobyte(returnBase(form.rgb_b.value,16)); if(sItem=="S"){ form.start.value="#"+fstr_r+fstr_g+fstr_b; }else if(sItem=="E"){ form.end.value="#"+fstr_r+fstr_g+fstr_b; }else if(sItem=="B"){ form.bg.value="#"+fstr_r+fstr_g+fstr_b; } } }else{ alert("输入的颜色数值不正确。"); eval("form.rgb_"+field2+"s.focus()"); } }else{ if(sItem=="S"){ fstr_r=form.start.value.substring(1,3); fstr_g=form.start.value.substring(3,5); fstr_b=form.start.value.substring(5,7); }else if(sItem=="E"){ fstr_r=form.end.value.substring(1,3); fstr_g=form.end.value.substring(3,5); fstr_b=form.end.value.substring(5,7); }else if(sItem=="B"){ fstr_r=form.bg.value.substring(1,3); fstr_g=form.bg.value.substring(3,5); fstr_b=form.bg.value.substring(5,7); } form.rgb_r.value=parseInt(fstr_r,16); form.rgb_g.value=parseInt(fstr_g,16); form.rgb_b.value=parseInt(fstr_b,16); } if(chkOK) AddText(); } } function AddText(){ var form=document.GradForm; var ss,ee,bb; eval("ss=0x"+form.start.value.substring(1)+";"); eval("ee=0x"+form.end.value.substring(1)+";"); eval("bb=form.bg.value"); str=GradientText(form,ss,ee,bb,form.showstr.value,"S"); display("fsample", str); } function setRGB(id,no){ var form=document.GradForm; var nid="rgb_"+id; if(id){ var tmp=eval("parseInt(form."+nid+".value)+parseInt("+no+")"); if(tmp<0) tmp=255; else if(tmp>255) tmp=0; eval("form."+nid+".value="+tmp); } fstr_r=twobyte(returnBase(form.rgb_r.value,16)); fstr_g=twobyte(returnBase(form.rgb_g.value,16)); fstr_b=twobyte(returnBase(form.rgb_b.value,16)); if(sItem=="S"){ form.start.value="#"+fstr_r+fstr_g+fstr_b; }else if(sItem=="E"){ form.end.value="#"+fstr_r+fstr_g+fstr_b; }else if(sItem=="B"){ form.bg.value="#"+fstr_r+fstr_g+fstr_b; } AddText(); } function SetColor(clr){ if(sItem=="S"){ document.GradForm.start.value="#"+clr; }else if(sItem=="E"){ document.GradForm.end.value="#"+clr; }else if(sItem=="B"){ document.GradForm.bg.value="#"+clr; } ResetValue(); AddText(); } function set(swtch){ if(swtch == 1) sItem="S"; else if (swtch == 2) sItem="E"; else if (swtch == 0) sItem="B"; ResetValue(); } function ResetValue(){ var form=document.GradForm; var str_r, str_g, str_b; if(sItem=="S"){ str_r=form.start.value.substring(1,3); str_g=form.start.value.substring(3,5); str_b=form.start.value.substring(5,7); }else if(sItem=="E"){ str_r=form.end.value.substring(1,3); str_g=form.end.value.substring(3,5); str_b=form.end.value.substring(5,7); }else if(sItem=="B"){ str_r=form.bg.value.substring(1,3); str_g=form.bg.value.substring(3,5); str_b=form.bg.value.substring(5,7); } form.rgb_r.value=parseInt(str_r,16); form.rgb_g.value=parseInt(str_g,16); form.rgb_b.value=parseInt(str_b,16); } function nomsg(){ self.status=""; } function myReset(){ AddText(); } //--> </script> <tr><td align=center width=450 height=400> <form name=GradForm> <table border=1 align="left"> <tr><td> <INPUT type=radio name=setitem value="bg" onClick="set(0)">背景色<input type=text name="bg" size=6 value="#FFFFFF" onChange="newRGB(1,'')"><INPUT type=radio name=setitem value="start" onClick="set(1)" checked>起始色<input type=text name="start" size=6 value="#FF0000" onChange="newRGB(1,'')"> <INPUT type=radio name=setitem value="end" onClick="set(2)">结束色<input type=text name="end" size=6 value="#0000FF" onChange="newRGB(1,'')"></td></tr><tr><td><font color="#FF0000">红</font> <input type="Button" value="+" onClick="setRGB('r',1)"><INPUT type=text name=rgb_r size=3 value=0 onChange="newRGB(0,'r')"><input type="Button" value="-" onClick="setRGB('r',-1)">?<font color="#009900">绿</font> <input type="Button" value="+" onClick="setRGB('g',1)"><INPUT type=text name=rgb_g size=3 value=0 onChange="newRGB(0,'g')"><input type="Button" value="-" onClick="setRGB('g',-1)">?<font color="#0000FF">蓝</font> <input type="Button" value="+" onClick="setRGB('b',1)"><INPUT type=text name=rgb_b size=3 value=255 onChange="newRGB(0,'b')"><input type="Button" value="-" onClick="setRGB('b',-1)"></td></tr><tr><td><TABLE BORDER=1 CELLSPACING=-1 CELLPADDING=1><TR><TD BGCOLOR="#FFFFFF"><a href="#" onClick="SetColor('FFFFFF');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#FFFF00"><a href="#" onClick="SetColor('FFFF00');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#FFE000"><a href="#" onClick="SetColor('FFE000');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#FFC000"><a href="#" onClick="SetColor('FFC000');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#FFA000"><a href="#" onClick="SetColor('FFA000');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#FF8000"><a href="#" onClick="SetColor('FF8000');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#FF6000"><a href="#" onClick="SetColor('FF6000');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#FF4000"><a href="#" onClick="SetColor('FF4000');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#FF0000"><a href="#" onClick="SetColor('FF0000');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#E00000"><a href="#" onClick="SetColor('E00000');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#C00000"><a href="#" onClick="SetColor('C00000');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#FFC0FF"><a href="#" onClick="SetColor('FFC0FF');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#FFA0FF"><a href="#" onClick="SetColor('FFA0FF');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#FF80FF"><a href="#" onClick="SetColor('FF80FF');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#FF60FF"><a href="#" onClick="SetColor('FF60FF');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#FF00FF"><a href="#" onClick="SetColor('FF00FF');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#E000FF"><a href="#" onClick="SetColor('E000FF');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#C000FF"><a href="#" onClick="SetColor('C000FF');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#A000FF"><a href="#" onClick="SetColor('A000FF');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#8000FF"><a href="#" onClick="SetColor('8000FF');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#00FFFF"><a href="#" onClick="SetColor('00FFFF');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#00E0FF"><a href="#" onClick="SetColor('00E0FF');return false" onMouseOver="nomsg();return true"> </a></TD></tr><tr><TD BGCOLOR="#00C0FF"><a href="#" onClick="SetColor('00C0FF');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#00A0FF"><a href="#" onClick="SetColor('00A0FF');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#0080FF"><a href="#" onClick="SetColor('0080FF');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#0060FF"><a href="#" onClick="SetColor('0060FF');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#0000FF"><a href="#" onClick="SetColor('0000FF');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#0000E0"><a href="#" onClick="SetColor('0000E0');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#0000C0"><a href="#" onClick="SetColor('0000C0');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#D0FF00"><a href="#" onClick="SetColor('D0FF00');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#A0FF00"><a href="#" onClick="SetColor('A0FF00');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#80FF00"><a href="#" onClick="SetColor('80FF00');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#00FF00"><a href="#" onClick="SetColor('00FF00');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#00E000"><a href="#" onClick="SetColor('00E000');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#00C000"><a href="#" onClick="SetColor('00C000');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#00A000"><a href="#" onClick="SetColor('00A000');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#008000"><a href="#" onClick="SetColor('008000');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#00A0A0"><a href="#" onClick="SetColor('00A0A0');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#A0A000"><a href="#" onClick="SetColor('A0A000');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#A0A0A0"><a href="#" onClick="SetColor('A0A0A0');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#A0A0E0"><a href="#" onClick="SetColor('A0A0E0');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#E0A0A0"><a href="#" onClick="SetColor('E0A0A0');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#A0E0A0"><a href="#" onClick="SetColor('A0E0A0');return false" onMouseOver="nomsg();return true"> </a></TD><TD BGCOLOR="#000000"><a href="#" onClick="SetColor('000000');return false" onMouseOver="nomsg();return true"> </a></TD></TR></TABLE></td></tr><tr><td>显示文字： <input type=text name="showstr" value="Typhoon Start" onChange="AddText()"> </td></tr><tr><td><input type=hidden name="tempVal" value="">代码如下：<br><TEXTAREA wrap=soft name=code COLS=62 ROWS=6">
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